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PGP.md

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PGP Support in Mailozaurr

Mailozaurr is able to sign and encrypt messages using OpenPGP. The implementation relies on MimeKit and a temporary key store so that no permanent changes are made to the user's environment.

Ephemeral key store

The EphemeralOpenPgpContext class creates a temporary directory that is removed when the context is disposed. It inherits from GnuPGContext and is used internally by the SMTP helper methods when signing or encrypting with PGP.

using var ctx = new EphemeralOpenPgpContext();
// import keys and use ctx for signing or encryption

Sending a PGP encrypted message

Use Send-EmailMessage with the PgpSignAndEncrypt option. Provide paths to the public and private key files and the password protecting the private key:

$pub = 'Examples/PGPKeys/mimekit.gpg.pub'
$sec = 'Examples/PGPKeys/mimekit.gpg.sec'
Send-EmailMessage -From 'mimekit@example.com' -To 'mimekit@example.com' \ 
    -Server 'smtp.example.com' -Port 25 -Body 'Test' -Subject 'Test' \ 
    -SignOrEncrypt PgpSignAndEncrypt -PublicKeyPath $pub -PrivateKeyPath $sec \ 
    -PrivateKeyPassword 'no.secret'

The message will be signed and encrypted before being sent.